bsd bof asia bsdcon 2004 - watson
TRANSCRIPT
IntroductionIntroductionBSD BoFBSD BoF
● BoF– Birds of a Feather
● Nominally a BSD BoF– But I'll talk mostly about FreeBSD– A brief talk on FreeBSD status– Q&A, problems, etc
Obligatory About FreeBSD SlideObligatory About FreeBSD Slide
● FreeBSD is a production-quality operating system derived from BSD UNIX– Widely deployed as a component, and in its own
right● Workstation, server, and high-end embedded markets
– Berkeley permits broad commercial re-use in open and closed source products
– i386, ia64, amd64, sparc64, alpha
Releases over the Past 13 MonthsReleases over the Past 13 Months
● FreeBSD 4.x-STABLE continues incremental feature, performance, stability development– FreeBSD 4.8 (April, 2003)– FreeBSD 4.9 (October, 2003)
● FreeBSD 5.x-CURRENT continues higher risk development, approaches -STABLE– FreeBSD 5.0 (January, 2003)– FreeBSD 5.1 (June, 2003)– FreeBSD 5.2 (January, 2004)– FreeBSD 5.2.1 (February, 2004)
FreeBSD 4.8FreeBSD 4.8
● Port of OpenBSD crypto framework, drivers● FAST_IPSEC; IP fragment DoS resistance● Firewire, more USB serial drivers; more
device polling support for ethernet drivers● Hyper-threading hits 4.x● Various security fixes● Third party software upgrades, etc
FreeBSD 4.9FreeBSD 4.9
● Incremental development continues– PAE – Intel's >4GB physical memory extensions– Hardware accelerated crypto enhancements,
USB ethernet device drivers, etc.– O_DIRECTIO– Various contributed software updates (OpenSSL,
OpenSSL, sendmail, etc)– Various security fixes
FreeBSD 5.0FreeBSD 5.0
● First cut off of the 5.x Technology Branch– SMPng, sparc64, ia64, UFS extended attributes,
ACLs, Mandatory Access Control, GEOM, GBDE, OpenPAM, ACPI, TIRPC, IPFW2, Firewire, UFS2, bgfsck, ufs snapshots, bluetooth, atapicam, devd, FAST_IPSEC, gcc 3.2, CardBus, devfs, ...
● Motivate stability, performance improvements
● Provide early access to consumers, product developers, etc.
FreeBSD 5.1FreeBSD 5.1
● Features– PAE, NSS, libkse, libthr, HTT, amd64, NFS
locking, jail management, lazy context switch, SCHED_ULE, no major numbers, EHCI, various USB network drivers, reduced tcp state on connection close, volume labels on UFS and UFS2, / on vinum, DIRECTIO, dump snapshots, thread-safe rtld, ACPI updates, ...
● More stability, performance– Lock pushdowns– Much broader exposure, testing
FreeBSD 5.2FreeBSD 5.2
● Features– Full Tier-1 support for UP/SMP AMD64 systems– Dynamically linked root partition– IDE SATA, 802.11a/b/g devices, ACPI upgrades– NFSv4 client– IP forwarding plane now runs without Giant lock– Gnome 2.4, KDE 3.1
● And more stability, performance
FreeBSD Development TreeFreeBSD Development Tree
4.x-STABLE
5.x-CURRENT
5.x-STABLE
6.x-CURRENT
FreeBSD 4.10 in 2004Q2FreeBSD 4.10 in 2004Q2
● FreeBSD 4.10 incremental release– Stability, performance enhancements– Bug fixes– Additional driver updates– Contributed software updates– ACPI power management– KDE 3.2
FreeBSD 5.3 in 2004Q3FreeBSD 5.3 in 2004Q3
● FreeBSD 5.3-RELEASE: Maturity!– KSE “M:N” threading the default– SMP enhancements
● SCHED_ULE scheduler the default● Network stack running Giant-free● VM running entirely Giant-free
– NDISulator● Use Windows network device drivers
– OpenBSD's 'pf' packet filter integrated– Experimental support for Vinum in GEOM
KSE StatusKSE Status
● KSE: M:N threading implementation similar to Scheduler Activations
● libthr: 1:1 threading using KSE kernel primitives (not Linux semantics)
● Default in -CURRENT (shipped in 5.3)● Runs KDE, Java, OpenOffice, ...● SCHED_ULE offers thread affinity bits,
especially in HTT context, per-cpu queues
SMPng StatusSMPng Status
● Process locking complete
● File descriptor locking about done
● Pipe locking except VM optimizations
● VM is about 2/3● GEOM storage● IP stack in progress
● Kernel memory allocation
● Support for HTT● SMP scheduler
(ULE)● MAC Framework● Buffer cache ¾● VFS cleanups● Lazy TLB
Developer Summit IVDeveloper Summit IV
● Two-day developer summit– June 10-11 2003 in San Antonio– June 10: unstructured working groups, hacking...– June 11: structured presentations, moderated
discussion ● Very productive
– Roadmap towards 5.2, 6.x clarified; 4.x life cycle– Removal of buffer cache, network stack/storage
lockdown, prebinding, bridge burning, HTT scheduler optimization, lazy context switches, ...
Dev Summit IVDev Summit IV
ConclusionConclusion
● Things are very exciting– 5.x branch is maturing well
● Aggressive feature set● SMPng work progressing; optimization, stability● M:N/1:1 threading support increasingly productionable
– 4.x branch continues to offer high performance and stability
● Will continue to see incremental improvements, optimizations; will remain most widely deployed
Q&AQ&A
● Any questions